GB797035A - Combination master cylinder and power valve - Google Patents
Combination master cylinder and power valveInfo
- Publication number
- GB797035A GB797035A GB23494/56A GB2349456A GB797035A GB 797035 A GB797035 A GB 797035A GB 23494/56 A GB23494/56 A GB 23494/56A GB 2349456 A GB2349456 A GB 2349456A GB 797035 A GB797035 A GB 797035A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressure
- fluid
- piston
- master cylinder
- port
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000012530 fluid Substances 0.000 abstract 10
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
- B60T13/16—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using pumps directly, i.e. without interposition of accumulators or reservoirs
- B60T13/161—Systems with master cylinder
- B60T13/165—Master cylinder integrated or hydraulically coupled with booster
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/30505—Non-return valves, i.e. check valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/505—Pressure control characterised by the type of pressure control means
- F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
- F15B2211/50536—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using unloading valves controlling the supply pressure by diverting fluid to the return line
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/505—Pressure control characterised by the type of pressure control means
- F15B2211/50554—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure downstream of the pressure control means, e.g. pressure reducing valve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
- F15B2211/5151—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and a directional control valve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/52—Pressure control characterised by the type of actuation
- F15B2211/521—Pressure control characterised by the type of actuation mechanically
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/52—Pressure control characterised by the type of actuation
- F15B2211/528—Pressure control characterised by the type of actuation actuated by fluid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/55—Pressure control for limiting a pressure up to a maximum pressure, e.g. by using a pressure relief valve
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/2496—Self-proportioning or correlating systems
- Y10T137/2703—Flow rate responsive
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Transmission Of Braking Force In Braking Systems (AREA)
- Braking Systems And Boosters (AREA)
Abstract
797,035. Fluid-pressure brakes. BENDIX AVIATION CORPORATION. July 30, 1956 [Aug. 15, 1955], No. 23494/56. Class 103 (1). In a combination power valve and master cylinder unit that functions as a power valve as long as power fluid is available at a useful pressure and automatically functions as a pump when the pressure of the power fluid is less than that it is desired to deliver, the pedal reaction rises at a greatly increased rate during power operation when the delivered pressure exceeds a predetermined value to limit the maximum value of the delivered pressure. In the embodiment illustrated, the unit comprises a master cylinder 11 containing a master piston 12 adapted to be moved into cylinder 11 by an actuating lever 13 fulcrumed to body 10 at 14; a reaction piston 20 being provided between the master cylinder chamber 11 and a reaction chamber 16 having a working port 17 and line 18 leading to the wheel brake cylinders. Fluid pressure is supplied by pump 27 to the pressure port 26 past check valve 28 into pressure chamber 32 and when this pressure exceeds the highest desired pressure required for full power operation in the working port 17, stop 65 is extended against the force of spring 68 by the pressure in chamber 67 to limit movement of the master piston 12 by the adjusting lever 13 and poppet valve 57 is opened to permit free communication of the fluid between the master cylinder 11 and the return port 29 and move lever 13 in an anti-clockwise direction to advance master piston 12 which is opposed only by springs 23 and 15. A slight initial movement of the master piston 12 compresses piston-ring 23 to a point where its force exceeds that of spring 22 such that the reaction piston 20 is advanced to close passage 41 against poppet valve 40 to disconnect the return port 29 from the reaction chamber 16 and then move valve 36 off its seat to admit pressure fluid from the chamber 32 into reaction chamber and thence in working port 17 and line 18 to the wheel brake cylinders. The increase in pressure in the reaction chamber 16 as the pressure rises in the port 17 produces a reaction force opposing pedal movement which is proportional to the pressure being delivered through port 17. Output pressure may rise to 400 lbs. per square inch during movement of the master cylinder piston to engagement with the very stiff spring 24 and thereafter rise to 900 lbs. per square inch (maximum) with a very slight additional movement - prior to engagement of arm 13a with stop 65. Should the power pressure be too low to be of any appreciable value, poppet valve 57 is closed by a spring 63 so that escape of fluid from master cylinder 11 to return port 29 is prevented; the master cylinder performing its natural function such that advance of the piston 12 into the master cylinder displaces fluid therefrom through a passage 75, past check valve 76 directly to working port 17 and the reaction piston 20 also moves with the piston 12 to close poppet valve 40 on to its seat and prevent escape of fluid from the reaction chamber 16 to the return port 29. The power poppet valve 36 is also opened but fluid cannot escape through the power port 26 because of the check valve 28 in the power supply line. Repeated strokes of the master cylinder may be necessary to provide sufficient pressure to the wheel brake cylinders; fresh fluid from the reservoir 30 being drawn into the master cylinder via return port 29 past check valve 46. A modification is described and illustrated in the Specification wherein the stop 65 is replaced by a relief valve for limiting the pressure that can be produced in the working port.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US528148A US2795234A (en) | 1955-08-15 | 1955-08-15 | Combination master cylinder and power valve |
Publications (1)
Publication Number | Publication Date |
---|---|
GB797035A true GB797035A (en) | 1958-06-25 |
Family
ID=24104440
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB23494/56A Expired GB797035A (en) | 1955-08-15 | 1956-07-30 | Combination master cylinder and power valve |
Country Status (3)
Country | Link |
---|---|
US (1) | US2795234A (en) |
FR (1) | FR1158508A (en) |
GB (1) | GB797035A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3237411A (en) * | 1963-12-13 | 1966-03-01 | Girling Ltd | Hydraulic braking systems |
US4651528A (en) * | 1983-11-10 | 1987-03-24 | Societe Anonyme D.B.A. | Hydraulic amplifier for braking system |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1142737B (en) * | 1960-03-16 | 1963-01-24 | Giuseppe Zomer | Control slide for double-acting fluid servomotors, especially for machine tools |
DE1179068B (en) * | 1962-03-16 | 1964-10-01 | Concordia Maschinen Und Elek Z | Solenoid operated valve |
US4076329A (en) * | 1977-01-12 | 1978-02-28 | Caterpillar Tractor Co. | Brake modulation valve for pedal-applied brakes |
FR2457202A1 (en) * | 1979-05-21 | 1980-12-19 | Ferodo Sa | HYDRAULIC CONTROL IN PARTICULAR FOR A MOTOR VEHICLE BRAKING DEVICE |
DE3301042A1 (en) * | 1983-01-14 | 1984-07-19 | Robert Bosch Gmbh, 7000 Stuttgart | HYDRAULIC TWO-CIRCUIT TANDEM MAIN BRAKE CYLINDER |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2478002A (en) * | 1943-12-31 | 1949-08-02 | Int Harvester Co | Valve structure manipulatable for controlling delivery of fluid at selective pressures |
US2478475A (en) * | 1946-02-15 | 1949-08-09 | Vickers Inc | Hydraulic power braking system |
US2688335A (en) * | 1950-03-17 | 1954-09-07 | Ralph R Gunderson | Booster valve unit for brakes |
US2676465A (en) * | 1950-06-24 | 1954-04-27 | John N Gladden | Hydraulic booster with floating mounting |
US2661597A (en) * | 1950-08-02 | 1953-12-08 | Dewandre Co Ltd C | Hydraulic control device |
US2696827A (en) * | 1951-02-13 | 1954-12-14 | Bendix Aviat Corp | Valve for power and manual actuation |
US2670004A (en) * | 1952-04-28 | 1954-02-23 | Bendix Aviat Corp | Combination master cylinder and power brake valve |
-
1955
- 1955-08-15 US US528148A patent/US2795234A/en not_active Expired - Lifetime
-
1956
- 1956-07-30 GB GB23494/56A patent/GB797035A/en not_active Expired
- 1956-08-14 FR FR1158508D patent/FR1158508A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3237411A (en) * | 1963-12-13 | 1966-03-01 | Girling Ltd | Hydraulic braking systems |
US4651528A (en) * | 1983-11-10 | 1987-03-24 | Societe Anonyme D.B.A. | Hydraulic amplifier for braking system |
Also Published As
Publication number | Publication date |
---|---|
FR1158508A (en) | 1958-06-16 |
US2795234A (en) | 1957-06-11 |
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